Opinions from B. L. Clark and R. Arnold 1923
- 'Acmaea belongs to Acmaeidae'
- 'Acmaea mitra belongs to Acmaea'
- 'Acmaea persona belongs to Acmaea'
- 'Acmaea victoriana belongs to Acmaea'
- 'Acmaeadae is corrected as Acmaeidae and belongs to Gastropoda'
- 'Agasoma belongs to Fusidae'
- 'Agasoma acuminatum belongs to Agasoma'
- 'Alectrionidae belongs to Gastropoda'
- 'Ampullina was reranked as Polinices (Ampullina) and belongs to Polinices'
- 'Ancilla belongs to Olividae'
- 'Ancillaria fishii is recombined as Ancilla fishii'
- 'Anomiidae belongs to Pelecypoda'
- 'Antigona belongs to Veneridae'
- 'Antiplanes belongs to Turritidae'
- 'Antiplanes muirensis belongs to Antiplanes'
- 'Arcidae belongs to Pelecypoda'
- 'Bullia (Molopophorus) was reranked as Molopophorus and belongs to Alectrionidae'
- 'Bursa belongs to Ranellidae'
- 'Calyptraea belongs to Calyptraeidae'
- 'Calyptraea (Galerus) mammillaris vancouverensis belongs to Calyptraea (Galerus) mammillaris'
- 'Calyptraea (Siphopatella) mamillaris [misspelled as Calyptraea (Galerus) mammillaris] belongs to Calyptraea (Galerus)'
- 'Calyptraea sookensis belongs to Calyptraea'
- 'Calyptraeidae belongs to Gastropoda'
- 'Cardiidae belongs to Pelecypoda'
- 'Cardium sookensis belongs to Cardium'
- 'Cerithiadae is corrected as Cerithiidae and belongs to Gastropoda'
- 'Cerithidea belongs to Cerithiidae'
- 'Cerithidea newcombei belongs to Cerithidea'
- 'Chione belongs to Veneridae'
- 'Chione vancouverensis belongs to Chione'
- 'Chlamys was reranked as Pecten (Chlamys) and belongs to Pecten'
- 'Chrysodomidae belongs to Gastropoda'
- 'Corbicula was reranked as Cyrene (Corbicula) and belongs to Cyrene'
- 'Crepidula belongs to Crepidulidae'
- 'Crepidula sookensis belongs to Crepidula'
- 'Crepidulidae belongs to Gastropoda'
- 'Cryptomya belongs to Myaciidae'
- 'Cryptomya quadrata belongs to Cryptomya' according to Arnold 1910
- 'Cryptomya quadrata belongs to Cryptomya'
- 'Cryptomya quadrata vancouverensis belongs to Cryptomya quadrata'
- 'Cyrena [misspelled as Cyrene] belongs to Cyrenidae'
- 'Cyrene (Corbicula) sookensis belongs to Cyrene (Corbicula)'
- 'Cyrenidae belongs to Pelecypoda'
- 'Cytherea newcombei is recombined as Saxidomus newcombei'
- 'Cytherea vancouverensis is recombined as Antigona vancouverensis'
- 'Desmostylus belongs to Sirenia'
- 'Desmostylus sookensis belongs to Desmostylus'
- 'Diplodonta belongs to Diplodontidae'
- 'Diplodonta stephensoni belongs to Diplodonta' according to Clark 1918
- 'Diplodonta stephensoni belongs to Diplodonta'
- 'Diplodontidae belongs to Pelecypoda'
- 'Doliidae belongs to Gastropoda'
- 'Eudolium belongs to Doliidae'
- 'Euspira was reranked as Polinices (Euspira) and belongs to Polinices'
- 'Fasciolariidae is corrected as Fasciolaridae and belongs to Gastropoda'
- 'Fissurellidae belongs to Gastropoda'
- 'Fusidae belongs to Gastropoda'
- 'Fusinus belongs to Fasciolaridae'
- 'Fusinus (Priscofusus) hannibali belongs to Fusinus (Priscofusus)'
- 'Gadinia belongs to Gadinidae'
- 'Gadinia reticulata belongs to Gadinia'
- 'Gadinia reticulata sookensis belongs to Gadinia reticulata'
- 'Gadinidae belongs to Gastropoda'
- 'Galerus was reranked as Calyptraea (Galerus) and belongs to Calyptraea'
- 'Glycymeris belongs to Arcidae'
- 'Glycymeris vancouverensis belongs to Glycymeris'
- 'Goniobasis belongs to Melaniidae'
- 'Goniobasis sookensis belongs to Goniobasis'
- 'Hemimactra was reranked as Spisula (Hemimactra) and belongs to Spisula'
- 'Ledidae belongs to Pelecypoda'
- 'Leptothyra belongs to Turbinidae'
- 'Littorina belongs to Littorinidae'
- 'Littorina sookensis belongs to Littorina'
- 'Littorinidae belongs to Gastropoda'
- 'Lucinidae belongs to Pelecypoda'
- 'Macoma belongs to Tellinidae'
- 'Macoma sookensis belongs to Macoma'
- 'Mactridae belongs to Pelecypoda'
- 'Megathura belongs to Fissurellidae'
- 'Megathura vancouverensis belongs to Megathura'
- 'Melaniidae belongs to Gastropoda'
- 'Metis belongs to Cyrenidae'
- 'Metis vancouverensis belongs to Metis'
- 'Modiola is corrected as Modiolus and belongs to Mytilidae'
- 'Modiolus sookensis belongs to Modiolus'
- 'Mulinia belongs to Mactridae'
- 'Mulinia newcombei belongs to Mulinia'
- 'Muricidae belongs to Gastropoda'
- 'Mya (Platyodon) cancellata is recombined as Platyodon cancellatus'
- 'Myacidae [misspelled as Myaciidae] belongs to Pelecypoda'
- 'Myadesma belongs to Myadesmidae'
- 'Myadesma dalli belongs to Myadesma'
- 'Myadesmidae belongs to Pelecypoda'
- 'Mytilidae belongs to Pelecypoda'
- 'Mytiloconcha was reranked as Mytilus (Mytiloconcha) and belongs to Mytilus'
- 'Mytilus belongs to Anomiidae'
- 'Mytilus (Mytiloconcha) vancouverensis belongs to Mytilus (Mytiloconcha)'
- 'Mytilus hannibali belongs to Mytilus'
- 'Mytilus mathewsonii is recombined as Mytilus (Mytiloconcha) mathewsoni'
- 'Mytilus sammamishensis belongs to Mytilus'
- 'Nassa newcombei is recombined as Molopophorus newcombei'
- 'Natica reclusiana is recombined as Polinices recluziana' according to Deshayes 1841
- 'Natica reclusiana is recombined as Polinices (Neverita) recluziana'
- 'Naticidae belongs to Gastropoda'
- 'Neverita was reranked as Polinices (Neverita) and belongs to Polinices'
- 'Oligochiton belongs to Amphineura'
- 'Oligochiton lioplax belongs to Oligochiton'
- 'Olividae belongs to Gastropoda'
- 'Ostrea belongs to Ostreidae'
- 'Ostrea sookensis belongs to Ostrea'
- 'Ostreidae belongs to Pelecypoda'
- 'Panope belongs to Saxicavidae'
- 'Panopea generosa is recombined as Panope generosa'
- 'Patella geometrica is recombined as Acmaea geometrica'
- 'Pecten belongs to Pectinidae'
- 'Pecten (Chlamys) cornwalli belongs to Pecten (Chlamys)'
- 'Pecten (Pseudamusium) vancouverensis sanjuanensis belongs to Pecten (Pseudamusium) vancouverensis'
- 'Pecten (Pseudamussium) vancouverensis is recombined as Pecten (Pseudamusium) vancouverensis'
- 'Pecten columbianum belongs to Pecten'
- 'Pectinidae belongs to Pelecypoda'
- 'Peronidia was reranked as Tellina (Peronidia) and belongs to Tellina'
- 'Phacoides belongs to Lucinidae'
- 'Phacoides columbianum belongs to Phacoides'
- 'Pholadidae belongs to Pelecypoda'
- 'Platyodon belongs to Myaciidae'
- 'Pododesmus belongs to Anomiidae'
- 'Pododesmus newcombei belongs to Pododesmus'
- 'Polinices belongs to Naticidae'
- 'Polinices (Ampullina) sookensis belongs to Polinices (Ampullina)'
- 'Polinices (Euspira) victoriana belongs to Polinices (Euspira)'
- 'Polinices (Neverita) recluziana vancouverensis belongs to Polinices (Neverita) recluziana'
- 'Priscofusus was reranked as Fusinus (Priscofusus) and belongs to Fusinus'
- 'Pseudamusium was reranked as Pecten (Pseudamusium) and belongs to Pecten'
- 'Puncturella belongs to Fissurellidae'
- 'Ranella vancouverensis belongs to Ranella'
- 'Ranellidae belongs to Gastropoda'
- 'Rapana belongs to Muricidae'
- 'Rapana perrini belongs to Rapana'
- 'Saxicavidae belongs to Pelecypoda'
- 'Saxidomus belongs to Veneridae'
- 'Scutella belongs to Scutellidae'
- 'Scutella newcombei belongs to Scutella'
- 'Scutellidae belongs to Echinoidea'
- 'Searlesia belongs to Chrysodomidae'
- 'Searlesia branneri belongs to Searlesia'
- 'Semele vancouverensis belongs to Semele'
- 'Semelidae belongs to Pelecypoda'
- 'Serpula belongs to Polychaeta'
- 'Siderastrea belongs to Fungiidae'
- 'Solen belongs to Solenidae'
- 'Solen clallamensis belongs to Solen'
- 'Solenidae belongs to Pelecypoda'
- 'Spisula belongs to Mactridae'
- 'Spisula (Hemimactra) hannibali belongs to Spisula (Hemimactra)'
- 'Spisula (Hemimactra) sookensis belongs to Spisula (Hemimactra)'
- 'Tellina belongs to Cyrenidae'
- 'Tellina bodegensis is recombined as Tellina (Peronidia) bodegensis'
- 'Tellina oregonensis belongs to Tellina'
- 'Tellina vancouverensis belongs to Tellina'
- 'Tellinidae belongs to Pelecypoda'
- 'Terebratalia belongs to Terebratellidae'
- 'Terebratella belongs to Terebratellidae'
- 'Terebratula transversa is recombined as Terebratalia transversa'
- 'Teredo belongs to Teredinae'
- 'Thais belongs to Muricidae'
- 'Thais cornwalli belongs to Thais'
- 'Turbinidae belongs to Gastropoda'
- 'Turridae is corrected as Turritidae and belongs to Gastropoda'
- 'Veneridae belongs to Pelecypoda'
- 'Venus belongs to Veneridae'
- 'Venus victoriana belongs to Venus'
- 'Yoldia belongs to Ledidae'
- 'Yoldia cooperii belongs to Yoldia'
- 'Zirfaea belongs to Pholadidae'